miz 3406121 Active Systems INFINITY 21 PURON AC CARRIER AIR CONDITIONING 24ANA136A31 CNPV*4221A**+UI 58MV(B,C)100-20 37000 13.80 18.50 1 pricing is very good. top of line residential equipment. the Infinity thermostat/control is simply the best on the market and the only way to go with an Infinity system. equipment model numbers listed are correct. you do want a new refrigerant lineset. what size outside condenser are you replacing? was a heat/cool load calc performed to verify correct equipment size? You do want the "T" tin plated evap coil. verify with dealer. I prefer venting out the side if possible over roof venting. what are you doing about a whole house air cleaner for IAQ and protection of blower motor and evap coil? do you have any issues with ductwork system that need addressing? ductwork is often the third leg of a new installation that is often overlooked. have you considered a Carrier ext warranty? I would only use a Carrier FAD-Factory Authorized Dealer. IMO Good Luck!

Zip Code 21234 is a Maryland zip. I am 21009 in Bel Air. FYI: A Carrier 21 SEER is not actually 21 SEER. Don't be fooled by the marketing bullsh%t. You should consider a heat pump w/gas furnace supplimentary heat (dual fuel or hybrid). You say it is not cost effective, but have you run the numbers? What is the delivered price of natural gas per therm? Post the model numbers of the heat pump condenser (or a/c condenser), matching indoor coil, and furnace, and we will provide the true SEER, EER, and HSPF from the American Refrigeration Institute. Good luck.

IâÂÂm surprised that an Infinity HP was mated with an 80% efficiency gas furnace and not an Infinity 96.6% efficiency MVB or a modulating MVC -3-stage furnace. Either of these furnaces would have the Infinity thermostat and variable speed blower, âÂÂIdeal Humidityâ etc. and probably have been able to better interface with your existing duct system by having the HP & furnace just run at lower speeds/capacities. I have not heard of an 80%AFUE Infinity gas furnace in our region (Canada). Largest capacity here is 113Mbtu @ 2000cfm for an Infinity gas furnace. Higher efficiency (96% Vs 80%) also means a smaller furnace may be installed as well as less fuel burned, lower emissions etc. In our region, Infinity HPs come in 1-ton increments and there is a substantial price differential between models. SR

Explanation by dealer is pure nonsense...as Mike says, blower motor can be adjusted to the 3 ton condenser...not an issue for someone who knows what they are doing!... Not the best coil choice either as far as performance/efficiency numbers. Here is a better choice. 7886932 Active Systems CARRIER AIR CONDITIONING PERFORMANCE SERIES PURON AC CARRIER AIR CONDITIONING 24ACC636A*030 CNPV*4324AL* 1080 58CTW090-16 34400 13.00 16.00 1RCU-A-CB Southeast and North 260 Yes IMO